William heston



W. VAL

, (N0 Mod l.)

Patented Dec.21,1897.

UNITED STATES PATENT OFFICE.

\VILLIAIWI I-IESTON, OF HOMESTEAD, PENNSYLVANIA, ASSIGNOR TO THE HOMESTEAD MANUFACTURING COMPANY, LIMITED, OF SAME PLACE.

VALVE.

SPECIFICATION forming part of Letters Patent No. 596,000, dated December 21, 1897.

Application filed October 24, 1896. Serial No. 609,994. (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM HEsToN, a citizen of the United States, residing at Homestead, in the county of Allegheny and State of Pennsylvania, have inventeda certain new and useful Improvement in Valves, of which the following is a full, clear, and exact description.

This invention relates more especially to what may be called a straightway valve or, equally correct, a turning-plugg and the object of the invention is to provide a valve or plug which in the act of opening is eased off its seat and in the act of closing is forced to its seat, both which movements are positively limited.

The invention consists in a segmental plug one side only of which closes the valve and the other side of which is provided with cams which cooperate with an eccentric bushing in order to insure the ready opening and effectual closing of the valve, the plug cooperating with the bushing in both movements posi tively to limit its throw and hence insure the full opened and closed positions.

In the accompanying drawings,illustratin g my invention, in the several figures of which like parts are similarly designated, Figure 1 is atop plan view with the cap removed. Fig. 2 is a vertical section in open position. Fig. 3 is avertical section in closed position. Fig. Aisacrosssection of the valve open as in Fig. 2. Fig. 5 is across-section of the valve closed as in Fig. 3, and Fig. 6 shows in perspective the valve-stem and valve or plug detached.

The shell or casing a may be of any approved construction, with a plug-seat of cylindrical or taper bore and having the inlet nipple b and the outlet-nipple c. The outlet end of the, valve-shell is recessed to receive a removable bushing d, which is made eccentric with relation to the bore and has the projecting edge d.

The plug or Valve proper, c, has a foot f, provided with a gudgeon f, which is stepped in the bottom of the casing, a head g, having a socket g for the valvestem h, and a face 2', which is the active opening and closing surface or member of the valve. The outer vertical ends of the foot and head are made eccen trio with relation to the bore of the shell and concentric with relation to the bushing, and the facet is concentric with relation to the bore, and its vertical edge extends beyond the edge of the bushing.

As shown in Figs. 2 and l, when the valve is opened the head and foot move away from the bushing into the bore and clear of its wall, while the face moves toward the bushing, the further movement of the valve beyond full-open position being arrested by contact of the edge of the face of the valve with that edge of the bushing which projects into the bore of the casin g. Hence an easy movement of the valve is effected and its full opening, nothing more or less, is insured. In closing, as shown in Figs. 1, 3, and 5, the occentric ends of the foot and head, as soon as they reach their full planes of concentricity with the bushing, arrest the further movement of the plug, and the face i being diametrically opposite the full closing of the valve is insured, and, moreover, inasmuch as the bushing is eccentric with relation to the bore it serves to crowd the face to its seat and thus to insure a perfectly fluid-tight closmg. I

I have described the end I) as the inlet and c as the outlet, but the valve may be used the other way, and in case a is the inlet then the pressure entering the valve between its head and foot and extending above the head and below the foot as well the said plug or valve will be pressure-balanced.

I do not limit my invention to the use of the stem and stem connection shown. I may adapt to this valve the cam feature of my Patents Nos. 560,993 and 560,994, dated May 26, 1896. As the bushing becomes worn it may be replaced.

hat I claim is-- 1. A segmental plug, having a foot f, and a head g, both made with their outer vertical ends eccentric, and a vertical face '5, made concentric with relation to the bore of the casing, combined with said casing and the bushing d made eccentric with relation to the bore of the casing and having the edge d projecting into the said bore and intercepting the path of movement of the face of the plug, substantially as described.

2. A segmental plug, .ltVlDg a foot f, and

rotation upon which it is shiftable as it is IO moved toward and from the bushing, sub- 7 stantially as described.-

In testimony whereof I have hereunto set my hand this 22d day of October, A. D. 1896.

XVILLIAM IIESTON.

XVitnesses:

REID KENNEDY, F. J. ERBEOK. 

